/**
 * 
 */
package scheduling.GUI.MainFrame;

import java.awt.Component;
import java.awt.Dimension;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;

import javax.swing.AbstractButton;
import javax.swing.BorderFactory;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.JTabbedPane;
import javax.swing.plaf.basic.BasicButtonUI;

/**
 * @author Morten Lorenzen
 *
 */
public class TabComponent extends JPanel{

	private static final long serialVersionUID = 1L;
	
	private final JTabbedPane pane;

    public TabComponent(final JTabbedPane pane) {
        //unset default FlowLayout' gaps
        super(new FlowLayout(FlowLayout.LEFT, 0, 0));
        if (pane == null) {
            throw new NullPointerException("TabbedPane is null");
        }
        this.pane = pane;
        setOpaque(false);
        
        //make JLabel read titles from JTabbedPane
        JLabel label = new JLabel() {
			private static final long serialVersionUID = 1L;

			public String getText() {
                int i = pane.indexOfTabComponent(TabComponent.this);
                if (i != -1) {
                    return pane.getTitleAt(i);
                }
                return null;
            }
        };
        label.setFont(new Font("Verdana", 1, 14));
        add(label);
        //add more space between the label and the button
        label.setBorder(BorderFactory.createEmptyBorder(0, 0, 0, 5));
        //tab button
        JButton button = new TabButton();
        add(button);
        //add more space to the top of the component
        setBorder(BorderFactory.createEmptyBorder(2, 0, 0, 0));
    }
    
    private class TabButton extends JButton implements ActionListener {
        public TabButton() {
            int size = 17;
            setPreferredSize(new Dimension(size, size));
            setToolTipText("close this tab");
            //Make the button looks the same for all Laf's
            setUI(new BasicButtonUI());
            //Make it transparent
            setContentAreaFilled(false);
            //No need to be focusable
            setFocusable(false);
            setBorder(BorderFactory.createEtchedBorder());
            setBorderPainted(false);
            //adding Icon
            setIcon(new ImageIcon("Icons/cancel.png"));
            //Making nice rollover effect
            //we use the same listener for all buttons
            addMouseListener(buttonMouseListener);
            setRolloverEnabled(true);
            //Close the proper tab by clicking the button
            addActionListener(this);
        }

        public void actionPerformed(ActionEvent e) {
            int i = pane.indexOfTabComponent(TabComponent.this);
            if (i != -1) {
                pane.remove(i);
            }
        }

//        //we don't want to update UI for this button
//        public void updateUI() {
//        }
//
//        //paint the cross
//        protected void paintComponent(Graphics g) {
//            super.paintComponent(g);
//            Graphics2D g2 = (Graphics2D) g.create();
//            //shift the image for pressed buttons
//            if (getModel().isPressed()) {
//                g2.translate(1, 1);
//            }
//            g2.setStroke(new BasicStroke(2));
//            g2.setColor(Color.BLACK);
//            if (getModel().isRollover()) {
//                g2.setColor(Color.MAGENTA);
//            }
//            int delta = 6;
//            g2.drawLine(delta, delta, getWidth() - delta - 1, getHeight() - delta - 1);
//            g2.drawLine(getWidth() - delta - 1, delta, delta, getHeight() - delta - 1);
//            g2.dispose();
//        }
    }

    private final static MouseListener buttonMouseListener = new MouseAdapter() {
        public void mouseEntered(MouseEvent e) {
            Component component = e.getComponent();
            if (component instanceof AbstractButton) {
                AbstractButton button = (AbstractButton) component;
                button.setBorderPainted(true);
            }
        }

        public void mouseExited(MouseEvent e) {
            Component component = e.getComponent();
            if (component instanceof AbstractButton) {
                AbstractButton button = (AbstractButton) component;
                button.setBorderPainted(false);
            }
        }
    };

}
